CN103345029B - Nonmetal anti-freezing anti-squeezing lead-in optical cable and manufacturing method thereof - Google Patents
Nonmetal anti-freezing anti-squeezing lead-in optical cable and manufacturing method thereof Download PDFInfo
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- CN103345029B CN103345029B CN201310287368.6A CN201310287368A CN103345029B CN 103345029 B CN103345029 B CN 103345029B CN 201310287368 A CN201310287368 A CN 201310287368A CN 103345029 B CN103345029 B CN 103345029B
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Abstract
The invention relates to a nonmetal anti-freezing anti-squeezing lead-in cable penetrating through a steel tube and a manufacturing method of the nonmetal anti-freezing anti-squeezing lead-in cable penetrating through the steel tube, in particular to a nonmetal anti-freezing anti-squeezing lead-in optical cable and a manufacturing method of the nonmetal anti-freezing anti-squeezing lead-in optical cable. The nonmetal anti-freezing anti-squeezing lead-in optical cable comprises optical fibers, fiber paste, loose tubes, a nonmetal center reinforcing core, a first waterproof layer, a reinforcing layer, an inner protection layer, a buffering layer, a second waterproof layer and an outer protection layer. According to the nonmetal anti-freezing anti-squeezing lead-in optical cable, 4-6 loose tubes are selected and used for encircling the nonmetal reinforcing core and being stranded. 2-12 optical fibers are arranged in each loose tube. After the loose tubes are stranded, the first waterproof layer wraps the stranded loose tubes. Aramid fibers are used as the reinforcing layer. The inner protection layer is arranged outside the reinforcing layer in a squeezed mode. The buffing layer with a thickness of 4-6mm wraps the inner protection layer. The second waterproof layer wraps the buffering layer. Finally, the outer protection layer wraps the second waterproof layer. The nonmetal anti-freezing anti-squeezing lead-in optical cable is provided with a certain rebound space, improves the ability of resisting freeing and squeezing of the optical cable penetrating the steel tube in the frozen state, and guarantees normal communication of the optical cable.
Description
Technical field
Nonmetal antifreeze introducing cable and preparation method thereof when one that what nonmetal antifreeze anti-extrusion leading in cable of the present invention and preparation method thereof related to is passes through steel pipe.
Background technology
At present, conventional leading in cable adopts traditional non-metal optical cable structure, and after fiber cable laying, pipe two ends use the plug sealings such as spunyarn, but due to when expanding with heat and contract with cold, optical cable material, the expansion coefficient of steel pipe etc. is inconsistent, and after laying a period of time, sealing effectiveness is deteriorated, water is caused to penetrate into steel pipe, in conjunction with the climatic environment of the northern area of China, after weather turns cold, pipe internal water accumulation will freezing and expansion.Because traditional non-metallic optical fiber cables elasticity is poor, cannot absorb the volume expanding after water becomes ice and increase, therefore, the bulging force of ice will act directly on optical cable, makes optical fiber be subject to compressing and even ruptures, cause the generation of optical cable freeze injury obstacle.Although have when constructing to optical cable outer wrapping one deck scum rubber, to reduce the extruding force that optical cable is subject to, its scum rubber when crossing pipeline is easily worn, and safeguards also more difficult, and effect is very not remarkable yet.This type of obstacle is once occur, and repairing difficulty is large, and release time is long, and the economic loss caused to user and impact are immeasurable, so be necessary to design the actual demand that a kind of product can meet market.
Summary of the invention
Nonmetal antifreeze anti-extrusion leading in cable provided for above-mentioned weak point and preparation method thereof is provided, under being applicable to the environment in outdoor subzero tens degree of the north, when not changing existing construction method, its impact that will effectively improve freezing disaster leading in cable is normally worked.
The nonmetal antifreeze anti-extrusion leading in cable of the present invention has certain resilience space, improve the optical cable anti-ice under icing condition be through in steel pipe and freeze the ability of extruding, ensure the proper communication of optical cable, low-smoke non-halogen flame-retardant sheath produces minute quantity noxious material and smog simultaneously, has excellent environmental performance.
Nonmetal antifreeze anti-extrusion leading in cable and preparation method thereof takes following scheme to realize:
Nonmetal antifreeze anti-extrusion leading in cable comprises optical fiber, fine cream, Loose tube, metalloid core strengthening core, water blocking layer one, enhancement Layer, sheath, cushion, water blocking layer two and outer jacket.
Described nonmetal antifreeze anti-extrusion leading in cable selects 4 ~ 6 Loose tube stranded around a nonmetal strengthening core, every root Loose tube includes 2 ~ 12 core fibres, after 4 ~ 6 Loose tube are stranded, are coated with water blocking layer one, are provided with aramid fiber as enhancement Layer, outside enhancement Layer, extrude sheath.Then the cushion that sheath outer cladding 4.0 ~ 6.0mm is thick, and with the coated cushion of water blocking layer two, be wrapped with oversheath at water blocking layer two.
The method for making of nonmetal antifreeze anti-extrusion leading in cable:
1. install on fiber placing shaft by 2 ~ 12 optical fiber, optical fiber put fine tension adjustment to 0.8 ~ 1N, Loose tube takeup tension adjusts to 10 ~ 20 N.
2. adopt cable sheath to mould extruding machine and extrude loose pipe box 2 ~ 12 outer fiber, pine pipe box adopts and extrudes polybutylene terephthalate (being called for short PBT), the special fine cream of filled fiber cable and optical fiber simultaneously, Loose tube external diameter 1.8 ~ 2.2mm, Loose tube wall thickness 0.3 ~ 0.5mm, cable sheath moulds extruding machine extrusion temperature 250 DEG C ~ 270 DEG C, and cable sheath moulds extruding machine speed of production 200 ~ 300m/min, and Loose tube excess length control is 0.4 ~ 2.0 ‰.
3. above-mentioned 4 ~ 6 Loose tube being filled with the special fine cream of optical cable and optical fiber are carried out SZ around a metalloid core strengthening core (fiberglass-reinforced plastic lever is called for short FRP) stranded, the special greasy for preventing water of filled fiber cable simultaneously, vertical bag water blocking layer one, completes stranding cable core.
4. enhancement Layer selects some aramid fibers; Use sheath extrusion die, adjust die location, when mould not core shift, aramid fiber is evenly stranded on stranding cable core, form enhancement Layer, enter sheath mould again, outside optical cable core and enhancement Layer, extrude polyethylene sheath material or thermoplastic low-smoke halide-free polyolefin jacket material does sheath.
5. the optical cable finishing sheath is utilized mould longitudinally coated one deck cushion, vertical bag water blocking layer two simultaneously, polyethylene sheath material is extruded or thermoplastic low-smoke halide-free polyolefin jacket material does outer jacket with optical cable sheath plastic extruding machine, cable jacket extrusion temperature is 150 DEG C ~ 260 DEG C, after sheathing, adopt double-deck bosh to cool, finally complete the production of the nonmetal antifreeze anti-extrusion leading in cable of finished product.
6. each production link of pair above-mentioned nonmetal antifreeze anti-extrusion leading in cable carries out the Performance Detection such as optical fiber attenuation, peeling force, length and stripping, after qualified by optical cable around on treucher, finished cable Optical Fiber Transmission performance need meet the decay of standard GB/T9771.3 optical fibre in optical cable G652:1310nm≤0.36dB/km, 1550 nm≤0.22dB/km, and cable machinery performance and environmental performance need meet YD/T 901-2009 nonmetal pipeline and introduce cable requirement.
Described water blocking layer one adopts optical cable waterstop.
Described water blocking layer two adopts optical cable waterstop.
Described sheath adopts polyethylene sheath material or thermoplastic low-smoke halide-free polyolefin jacket material, ensures the fire resistance of optical cable, reduces the harm to environment.
Described cushion adopts bipeltate.
Described outer jacket adopts polyethylene sheath material or thermoplastic low-smoke halide-free polyolefin jacket material, ensures the fire resistance of optical cable, reduces the harm to environment.
Described optical fiber adopts G.652D colored optical fiber (whole chromatogram).
Described aramid fiber model is 2840D.
Described Loose tube adopts polybutylene terephthalate.
Described metalloid core strengthening core adopts glass fiber reinforced plastics.
Nonmetal antifreeze anti-extrusion leading in cable is reasonable in design, under being applicable to the environment in outdoor subzero tens degree of the north completely, when not changing existing construction method, effectively can improve the impact of freezing evil on the proper communication of introducing cable.
Nonmetal antifreeze anti-extrusion leading in cable of the present invention and preparation method thereof has the following advantages:
1, the nonmetal antifreeze anti-extrusion leading in cable of this structure is by good structural design and technology controlling and process, has superior optics, machinery and environmental performance;
2, change the stranded radical of optical cable and central reinforce member size, reduce optical cable core size, multiple material water-proof material ensures that optical cable does not longitudinally seep water simultaneously;
3, select suitable padded coaming, increase the shrink space of optical cable, improve the anti-ice of optical cable under water freezing state and freeze extrusion capability;
4, aramid fiber or glass fibre yarn are as the design of enhancement Layer, ensure to have certain anti-rat by the pulling force that optical cable bears simultaneously;
5, thermoplastic low-smoke halide-free polyolefin jacket material does sheath and has good fire resistance, produces few noxious material and smog, has good environmental performance.
Accompanying drawing explanation
Below with reference to accompanying drawing, the invention will be further described.
Fig. 1 is nonmetal antifreeze anti-extrusion leading in cable structural representation.
With reference to accompanying drawing 1, nonmetal antifreeze anti-extrusion leading in cable comprises optical fiber 1, fine cream 2, Loose tube 3, metalloid core strengthening core 4, water blocking layer 1, enhancement Layer 6, sheath 7, cushion 8, water blocking layer 29 and outer jacket 10.
Described nonmetal antifreeze anti-extrusion leading in cable selects 4 ~ 6 Loose tube 3 stranded around a nonmetal strengthening core 4, every root Loose tube 3 includes 2 ~ 12 core fibres 1, after 4 ~ 6 Loose tube 3 are stranded, are coated with water blocking layer 1, are provided with aramid fiber as enhancement Layer 6, outside enhancement Layer 6, extrude sheath 7.Then the cushion 8 that sheath 7 outer cladding 4.0 ~ 6.0mm is thick, and with the coated cushion 8 of water blocking layer 29, be wrapped with outer jacket 10 at water blocking layer 29.
The method for making of nonmetal antifreeze anti-extrusion leading in cable:
1. install on fiber placing shaft by 2 ~ 12 optical fiber 1, optical fiber 1 put fine tension adjustment to 0.8 ~ 1N, Loose tube 3 takeup tension adjusts to 10 ~ 20 N.
2. adopt cable sheath to mould extruding machine and extrude loose pipe box 32 ~ 12 optical fiber 1 outsides, pine pipe box 3 adopts and extrudes polybutylene terephthalate (being called for short PBT), fill fine cream 2 and optical fiber 1 simultaneously, Loose tube 3 external diameter 1.8 ~ 2.2mm, Loose tube 3 wall thickness 0.3 ~ 0.5mm, cable sheath moulds extruding machine extrusion temperature 250 DEG C ~ 270 DEG C, and cable sheath moulds extruding machine speed of production 200 ~ 300m/min, and Loose tube 3 excess length control are 0.4 ~ 2.0 ‰.
3. above-mentioned 4 ~ 6 Loose tube 3 being filled with fine cream 2 and optical fiber 1 are called for short FRP around a metalloid core strengthening core 4(fiberglass-reinforced plastic lever) to carry out SZ stranded, and the special greasy for preventing water of filled fiber cable simultaneously, vertical bag water blocking layer 1, completes stranding cable core.
4. enhancement Layer 6 selects some aramid fibers; Use sheath extrusion die, adjust die location, when mould not core shift, aramid fiber is evenly stranded on stranding cable core, form enhancement Layer 6, enter sheath mould again, outside optical cable core and enhancement Layer 6, extrude polyethylene sheath material or thermoplastic low-smoke halide-free polyolefin jacket material does sheath 7.
5. the optical cable finishing sheath 7 is utilized mould longitudinally coated one deck cushion 8, vertical bag water blocking layer 29 simultaneously, polyethylene sheath material is extruded or thermoplastic low-smoke halide-free polyolefin jacket material does outer jacket 10 with optical cable sheath plastic extruding machine, cable jacket extrusion temperature is 150 DEG C ~ 260 DEG C, after sheathing, adopt double-deck bosh to cool, finally complete the production of the nonmetal antifreeze anti-extrusion leading in cable of finished product.
6. each production link of pair above-mentioned nonmetal antifreeze anti-extrusion leading in cable carries out the Performance Detection such as optical fiber attenuation, peeling force, length and stripping, after qualified by optical cable around on treucher, finished cable Optical Fiber Transmission performance need meet the decay of standard GB/T9771.3 optical fibre in optical cable G652:1310nm≤0.36dB/km, 1550 nm≤0.22dB/km, and cable machinery performance and environmental performance need meet YD/T 901-2009 nonmetal pipeline and introduce cable requirement.
Described water blocking layer one adopts optical cable waterstop.
Described water blocking layer two adopts optical cable waterstop.
Described sheath adopts polyethylene sheath material or thermoplastic low-smoke halide-free polyolefin jacket material, ensures the fire resistance of optical cable, reduces the harm to environment.
Described cushion adopts bipeltate.
Described outer jacket adopts polyethylene sheath material or thermoplastic low-smoke halide-free polyolefin jacket material, ensures the fire resistance of optical cable, reduces the harm to environment.
Described optical fiber adopts G.652D colored optical fiber (whole chromatogram).
Described aramid fiber model is 2840D.
Described Loose tube adopts polybutylene terephthalate.
Described metalloid core strengthening core adopts glass fiber reinforced plastics.
Claims (10)
1. a nonmetal antifreeze anti-extrusion leading in cable, is characterized in that: comprise optical fiber, fine cream, Loose tube, metalloid core strengthening core, water blocking layer one, enhancement Layer, sheath, cushion, water blocking layer two and outer jacket;
Select 4 ~ 6 Loose tube stranded around a nonmetal strengthening core, every root Loose tube includes 2 ~ 12 core fibres, water blocking layer one is coated with after 4 ~ 6 Loose tube are stranded, be provided with aramid fiber as enhancement Layer, sheath is extruded outside enhancement Layer, the cushion that sheath outer cladding 4.0 ~ 6.0mm is thick, adopts the coated cushion of water blocking layer two, is wrapped with oversheath at water blocking layer two.
2. the method for making of nonmetal antifreeze anti-extrusion leading in cable according to claim 1, is characterized in that:
(1). install on fiber placing shaft by 2 ~ 12 optical fiber, optical fiber put fine tension adjustment to 0.8 ~ 1N, Loose tube takeup tension adjusts to 10 ~ 20 N;
(2). adopt cable sheath to mould extruding machine and extrude loose pipe box 2 ~ 12 outer fiber, pine pipe box adopts and extrudes polybutylene terephthalate, the special fine cream of filled fiber cable and optical fiber simultaneously, Loose tube external diameter 1.8 ~ 2.2mm, Loose tube wall thickness 0.3 ~ 0.5mm, cable sheath moulds extruding machine extrusion temperature 250 DEG C ~ 270 DEG C, and cable sheath moulds extruding machine speed of production 200 ~ 300m/min, and Loose tube excess length control is 0.4 ~ 2.0 ‰;
(3). above-mentioned 4 ~ 6 Loose tube being filled with the special fine cream of optical cable and optical fiber are carried out SZ around a metalloid core strengthening core stranded, the special greasy for preventing water of filled fiber cable simultaneously, vertical bag water blocking layer one, completes stranding cable core;
(4). enhancement Layer selects some aramid fibers; Use sheath extrusion die, adjust die location, when mould not core shift, aramid fiber is evenly stranded on stranding cable core, form enhancement Layer, enter sheath mould again, outside optical cable core and enhancement Layer, extrude polyethylene sheath material or thermoplastic low-smoke halide-free polyolefin jacket material does sheath;
(5). the optical cable finishing sheath is utilized mould longitudinally coated one deck cushion, vertical bag water blocking layer two simultaneously, polyethylene sheath material is extruded or thermoplastic low-smoke halide-free polyolefin jacket material does outer jacket with optical cable sheath plastic extruding machine, cable jacket extrusion temperature is 150 DEG C ~ 260 DEG C, after sheathing, adopt double-deck bosh to cool, finally complete the production of the nonmetal antifreeze anti-extrusion leading in cable of finished product;
(6). optical fiber attenuation, peeling force, length and stripping Performance Detection are carried out to each production link of above-mentioned nonmetal antifreeze anti-extrusion leading in cable, after qualified by optical cable around on treucher, finished cable Optical Fiber Transmission performance need meet the decay of standard GB/T9771.3 optical fibre in optical cable G652:1310nm≤0.36dB/km, 1550 nm≤0.22dB/km, and cable machinery performance and environmental performance need meet YD/T 901-2009 nonmetal pipeline and introduce cable requirement.
3. nonmetal antifreeze anti-extrusion leading in cable according to claim 1, is characterized in that: described water blocking layer one adopts optical cable waterstop; Water blocking layer two adopts optical cable waterstop.
4. nonmetal antifreeze anti-extrusion leading in cable according to claim 1, is characterized in that: described sheath adopts polyethylene sheath material or thermoplastic low-smoke halide-free polyolefin jacket material to extrude into.
5. nonmetal antifreeze anti-extrusion leading in cable according to claim 1, is characterized in that: described cushion adopts bipeltate.
6. nonmetal antifreeze anti-extrusion leading in cable according to claim 1, is characterized in that: described outer jacket adopts polyethylene sheath material or thermoplastic low-smoke halide-free polyolefin jacket material.
7. nonmetal antifreeze anti-extrusion leading in cable according to claim 1, is characterized in that: described optical fiber adopts G.652D colored optical fiber.
8. nonmetal antifreeze anti-extrusion leading in cable according to claim 1, is characterized in that: described aramid fiber model is 2840D.
9. nonmetal antifreeze anti-extrusion leading in cable according to claim 1, is characterized in that: described Loose tube adopts polybutylene terephthalate.
10. nonmetal antifreeze anti-extrusion leading in cable according to claim 1, is characterized in that: described metalloid core strengthening core adopts glass fiber reinforced plastics.
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Effective date of registration: 20160314 Address after: The road town of Rudong County in Jiangsu province 226463 in Nantong City, No. 1 Patentee after: Zhongtian Science and Technology Co., Ltd., Jiangsu Patentee after: Zhongtian Technologies Fiber Optics Co., Ltd. Address before: The road town of Rudong County in Jiangsu province 226463 in Nantong City, No. 1 Patentee before: Zhongtian Science and Technology Co., Ltd., Jiangsu |